1.Vector

A vector is a set of numbers.

In Linear Algebra,the term vector refers to a column vector unless being explicitly mentioned otherwise.

2.Components(成员)

The entries of a vector,the i-th componment of vector V refers to 。

当 componment < 4 时，我们可以visualize it：

3.Scalar Multiplication(数乘)

数乘向量 百度百科

一个实数和一个向量相关的一种向量运算

4.Vector Addition

5.Vector Set

(1)A vector set can contain infinite element.

(2):We donate the set of all vectors with n entries by .(所有n维向量的和)

6.Properties of vector